Signaling device.



No. 654,625. 7 Patntd July slflsoo.

J. L. HALL. SIGNALING DEVICE.

(Application flledMay 10, 1900. (No Model.) 2 Sheds-Sheet Jnve'nbor 30h n LHQU No. 654,625. Patent ed July 3|, I900. J. L. HALL.

SIGNALING DEVICE.

rAp plication filed May 10, 1900.

2 Sheets-Sheet 2;

No Model.)

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V UNITED STATES PATENT FFIQE'O JOHN L. HALL, OF SOHENEOTADY, NEW YORK, ASSIGN OR TO THE GENERAL 1 ELECTRIC COMPANY, OF NEW YORK.

SIGNALING DEVIC E.

SPECIFICATION forming ater Letters ret t n etaeaaettea m 31, 1900.

Application filed May 10, 1900.

T0 ctZZ whom it may concern:

Be it known that I, JOHN L. HALL, a citizen of the United States, residing at Schenectady, county of Schenectady, State of. New York, have invented certain new and useful Improvements in Signaling Devices, (Case No. 1,324,) of which the following is aspecifica tlon.

This invention relates to projectors, and

sectional shutter provided with a controlling handle on the outside, by which the arc or other source of light in the focus may be cut' olf by shifting the sections of the shutter.

to form an opaque diaphragm between the source of light and the mirror. In order to render this as small in size as practicable, I mount the two movable sections on pivots in or near a transverse plane to the source of light, the sections being shaped so that when brought together they will surroundone of the arc-electrodes.

My invention therefore comprises a projector or signaling-shutter formed in sections and adapted to be shifted so as to interpose an opaque wall between the source of light and the mirror.

It comprises also other features, the novelty of which will be fully pointed out hereinafter and will be definitely indicated in the claims appended to this specification.

In the accompanyingdrawings, which illustrate my invention, Figure 1 is a front view of a standard electrically-trained projector to which my improvements have been applied.

Fig. 2 is a side elevation of my shutter, it being shown open in full lines and in closed position in dotted lines. Fig. 3 is a side elevation of one of theshutter-sections. Fig. 4 is a detail view of the operating-handle, and Fig. 5 is a partial side elevation of the signaling parts.

.As seen from Figs. 1 and 2, the shutter is seen No. 16,112. (No model.)

composed of two sections,which when brought together form a diaphragm, the two parts of which are capable of rotation in a vertical plane. Each sect-ion is carried by two metal arms 1.2, (see Fig. 3,) in which are mounted pivots 3 4, turning in the walls of the box or case 5 6, Fig. 2, behind the obturator or screen 18 and supported on rods or brackets 7 8, se-

cured to the inner wall of the drum. Toone ofthepivoted studs of each section is fas-- tened a gear-wheel 9. 10, the two wheels meshing together and being controlled by an operating handle 11 extending through the projector-casing or drum. This handle connects with oneof the gear-wheels by a universal joint, as indicated at 12 13, to permit the operating-handle to be led out of the drum at a convenient angle and to permit suificient freedom of motion to prevent distortion due to Warping or twisting of the supporting parts under the heat of the are when the projector is in operation.

I have shown my improved shutter as mounted on a projector of the type in which the drum is trained through a horizontal or vertical angle by an electric motor contained in the base 14. Projectors of this kind are of known and standard construction and are provided with various hand operating devices, as indicated in Fig. 1, for adjusting the projector, so that it may be motor or hand controlled. As these features have no direct bearing on my presentinvention, I deem it unnecessary to illustrate or describe them in detail.

The arc-regulating mechanism is contained in a casing 15, mounted on the bottom of the drum. It .will be evident from an inspection of Figs. 1 and 2 that by twisting the operating-handle the shutters may be opened to the position shown in full lines or closed to that indicated in dotted lines. In the latter posi tion an opaque wall is inserted between the arc and the mirror. The arc-electrodes are supported in the axis of the projector and adjusted by the regulating mechanism, which moves the electrode-supports 16 16. The shutter-sections are formed of sheet-iron spun into shape and corrugated to prevent warping or buckling and are provided at the narrow end with a semicircular edge 17, which IOC I that may be reflected from the black wallshf...

should belined with insulating material to prevent conductive relation to the negative electrode. This permits inclosure of the carbon electrode when the sections are brought together. A separate piece is riveted to one edge, as shown at the top of Fig. 2, at 2 O to cover the joint when the shutter isclosed. It Will be noted that the Shutter isbp'fi ififl front, which does not prevent it from entirely shutting off the beam of light. Such lightas. is seen is simply a glow, being only the light the drum andtheblack inside of the shutter, as all direct rays are stopped by the screen or obturator 18, attached to the magnet 19-. This magnet is an open iron annulus mag-- netized by the current passingthrough the electrode which it incloses and which est-ablishes a magnetic field in the neighborhood of the arc and prevents rotation or flaming of said arc.

This is, of common use in the art. I. prefer sheet-iron as the material employed for the shutter, as being better able than other common metals to withstand the great heat of the arc. While the organization herein described is of especial advantage in such a class of signaling devices as search-light projectors, my

improvements mayalso'be applied to other types of signaling-lanterns, the main feature of my invention being to provide a sectional shutter between the source of light and the mirror by which the beams may be cut 'offor transmission permitted.

1 I claim-- 1. A shutter for a search-light projector, or other signaling device composed of a plu rality of sections of opaque heat-resisting material mounted to shift between the source of light and the mirror, and means operative from the outside of the regulating device to shift the sections, to out OK or permit reflection oi the beam.

fiected beam, and means for rotating the'arms 1 to close the sections betweenthe are and the mirror. 7 T

5. A projector or lantern-shutter comprising a plurality of sections of opaque material mounted on armspivoted centrally of the beam, said arms being geared to a common operating-handle outside the drum.

6. A projector comprising a drum having be closed between thearc and the mirror and Ean obturator infront of the are.

7. A projector or'lantern-shutter having 'jof which are pivotally mounted, the several sections being closedforminga cone between the source of light and the mirror.

8. A projector or lantern-shutter formed of a plurality of corrugated sections or sheet metal adapted to fold or open between the source of light and the mirror. I In witness whereof I have hereunto set my handthis 7th day of May, 1900.

. JOHN L. HALL. Witnesses BENJAMIN B. HULL,

EDWARD .WILLIAMS, Jr.

warms pivoted ina supportcentrally, of the rearc-electrodes, a sectional shutter adapted to l within the casing a sectional shutter the parts 

